Coking-oven



0'. PIETTE.

COKING OVEN.

APPLICATION FILED NOV. 6. 1918. 1,370,481. Patented Mar. 1,1921.

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COKIN@ OVEN.

APPLICATION FILED NOV. 6. 1918. 1,870,481. Patented Mar. 1,1921.

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0. PIETTE.

COKING OVEN.

APPLICATION FILED NOV. 6, 191B- A 1,

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UNITED STATES PATENT OFFICE.

OLIVIER PIE'ITE, oF PARIS, FRANCE, AssIGNoR 'ro SOCIT ANONYME DES FOURS A CORE snMnr-soLvAY a PIETTE, A CORPORATION or THE KINGDOM or BELGIUM.

COXING-OVEN.

Specication of Letters Patent.

. Patented Mar. 1, 1921.

Application led November 6, 1918. Serial No. 261,424.

To all whom it lmaf/y concern.'

Be it known that I, OLIVIER PIETTE, a citlzen of Belgium, and a resident of Paris France, have invented certain new and useful Improvements in 'Coking-Ovens, of

tion of their heat to the regenerators, is prevented. A

In a certain type of horizontal ovens with vertical iiues and transverse regenerators, the two regenerator chambers provided for one phase of the heat recovery and whichl are located on the 'same side of the longitudlnal center line of the battery are of equal dimensions and communicate with one another b'y ductsV whose cross sectional area increases proportionately to their distance from the chimney.

The products of combustion, after being partially cooled in Ythe checker work in the 'first or primary regenerator chambers pass downwardly in the same throu h the above mentioned ducts into the secon ary regenerators, and passing upwardly through the checker work therein, escape to the chimneyA by means of the flues constituted by the free nspace above the checker work and under the arch of the secondary regenerator chamber.

section through an oven and Its regenerator foundation.

Fig. 2 is a partial vertical transverse section, and I Fig. 3 is a vertical section adjacent the reversing valve, the line A-B representing the axis of said valve.

Fig. 4 is a partial plan .sectiony on line 4 4` `of F1g.`3.

Fig. 5 is a of FIg. 3.

In the following description primed reference numbers are employed to' designate similar members or structures to those designated by the original numbers, but located pn the opposite side of the battery center In the annexed drawings 1 indicates a retort provided with doors, chargin holes and off-take in the usual manner. A jacent to the retort are side walls in whichare formed a plurality of 4vertical combustion iues 2 and 2 superimposed over gas chambers 3 and 3 with which they communicate partial plan section on line 5-5 vby means of ports 4 and 4. The combustion fines 2 and 2 terminate at their upper ends in a horizontal Hue 5 extending transversely to the battery center line and providing communication between the flues 2 and 2. Directly beneath each retort and extending parallel to the same and transversely to the battery center line are provided sole flues which are divided into halves 6 and 6 by wall 7. The sole flues 6 and 6 are each connected by twyers 8 and 8 with the groups of combustion fines 2 and 2 respectively, each half. sole flue connecting with the,1 adjacent group of combustion iiues in onewall only, for example, sole flue 6 communicates with combustlon flues 2 by means of twyers 8. Each sole flue 6 communicatesgwith the regenerator chamber al by means of the port 9 controlled by damper 10?; sole flue 6 connectin in like manregenerator chamber c by means of port 9 Vcontrolled by damper 10. Beneath the retorts and extending transversely thereto and parallel to the battery centerline are located the regenerator chambers c and' c and d and d', the secondary regenerators c and d being adjacent to a center line, but on opposite sides thereof. The primary regenerator c is located between e and one face of the lbattery andl the primary regenerator d between the regenerator d' and theopposite face of the battery.

The regenerators c and c' and d and d A are connected oil the foundation level by a 'plurality of ducts 11 and 11 respectively.

All regenerator chambers are provlded with checker-work of refractory material, the

chambers c and d being substantially filled with the same, while enough space is left clear under the arch of chambers c and d to provide Hues of ample cross-sectional area to conduct the products of combustion by passages ha to the. Chimney. Immediately above the lregenerator chambers c" and d andbetween same and the sole lues are provided airiues or channels g which conduct the air for combustion from the atmosphere to the reversing valve.

In the foundation of the battery and extending parallel to its longitudinal center line is provided a plurality of flues h shown by dotted lines in Fig. 4 which terminate at the chimney end of the battery in a transverse flue k communicating with the air inlet to the reversing valve by means of -lue h2 and which are open to the atmosphere at the opposite end of the battery. v

The gas is introduced into the gas chambers 3 and 3' by groups of gas ipes 12 and l2 which arrl each provided with stop valves whereby the flow of gas to the chambers may be regulated or stopped as required.

My improved oven operates as follows:

Cold air for combustion is conducted through iues it and 'g absorbing therein the heat radiated from lthe iioor of the regenerator chambers to the foundation and from the sole iues to the secondary regenerator arch. It being assumed that the right hand half of the oven as shown in Fig. 1 is to be heated, the air will be directed through one of the passages k3 into the secondary regenerator chamber d by means of the reversing valve z', will descend through same, pass through the flue l1 and ascending through y regenerator chamber d will be heated therein and flow into Ithe sole flue 6 whence it will be conducted by twyers 8 into combustion fines 2 where it will meet the gas admitted from chambers 3 by means of ports 4', and willl ignite. The products of combustion pass upwardly in fines 2', into the horizontal flue 5 from whence they travel downwardly in the iues 2 and into the regenerator chamber c (where the surrender a portion` of their heat to the c 'ecker work) by means of twyers 8, sole flue 6 and port 9. Passing downwardly through the regenerator c they are admitted by ues 11 to the chamber c which they traverse upwardly, giving up a further portion of thelr heat to the checker work therein, and escape to the chimney through the flue in the clear part of the chamber c. When the checker work in regeneratorchambers c and o has acquired suiieient heat from the products of combustion, the How of the air and products of combustion is reversed by properly positioning the reversing valve z', whereby air from flues g and h is admitted to regenerator c through the other passages h3 and regenerator d is placed in communication with the chimney, gas being admitted to the chambers 3 and excluded from chambers 3. Combustion will now take place in the iues 2 where the heated air and gas mix and ignite. The products of combustion will escape to the reversing valve and the chimney by the same path' as that followed by the air before reversal but will How in an opposite direction.

What I claim as my invention and desire to secure by Letters Patent of the United States is 1. In combination, in a coking oven hav-i ing transverse primary and secondary regenerator flues disposed below the combustion chambers and means for reversing the direction of the flow of the products of combustion, channels located between such secondary regenerator iiues and the combustion chambers, each of said channels at one end constituting an air inlet, and at the other end being connected with the secondary re'- generator lines, substantially as and for the purpose described.

2. In combination, in a coking oven having transverse primary and secondary regenerator iiues disposed below the combustion chambers, said secondary regenerator lues being of less height than said primary flues, means for reversing the direction of the flow of the products of combustion, and channels located between such secondary re' generator iues and the combustion chambers, each of said channels at one end constituting 'an air inlet,and at the other end 1 00 being connected with the secondary regenerator fiues, substantially as and for the purpose described.

In witness whereof I have signed this specificationv in the presence of two witnesses. v

OLIVIER PIETTE.. Witnesses: v PAUL Gorman,

vrALEXIS lV. TEUPOEM. 

